Stress distribuition, adaptation and compressive strength of monolithic crowns after thermomechanical loading in different materials

• Grant number: 14/23358-0
• Support Opportunities: Scholarships in Brazil - Master
• Start date: June 01, 2015
• End date: February 29, 2016
• Field of knowledge: Health Sciences - Dentistry - Dental Clinics
• Agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Altair Antoninha Del Bel Cury
• Grantee: Rafael Soares Gomes
• Host Institution: Faculdade de Odontologia de Piracicaba (FOP). Universidade Estadual de Campinas (UNICAMP). Piracicaba , SP, Brazil

Abstract

The resin nano ceramic (Rn) is a new class of dental material that has similar indications to the lithium disilicate glass ceramic (Ds), promising higher reliability than the latter. The aim of this study is to evaluate the stress distribution, marginal and internal adaptation, and compressive strength of monolithic crowns after thermomechanical cyclic loading in these two materials. The tension in these restorative materials will be evaluated by the three-dimensional finite element method by observing the stress distribution and location of maximum principal stress. To the in vitro test, first molars crowns will be made of Rn and Ds by CAD/CAM method (n=40). The marginal and internal adaptation will be measured by microtomography before and after cementation of crowns on a abutment morse taper screwed on an analog of implant. In sequence, the crowns of each material will be divided into 2 groups: control (Rn1 and Ds1, without loading) and experimental (Rn2 and Ds2, loading). After 10.000 thermal cycling (5°C - 55°C) and 400.000 mechanical cycles with sliding (F=70N), the crowns will be submitted to the compressive strength test conducted on a universal testing machine at a constant load speed of 1 mm/min until occurrence of fracture. It is presumed the use of ANOVA test with significance level of 5% for statistical analysis. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

GOMES, RAFAEL SOARES; PEDROSO BERGAMO, EDMARA TATIELY; BORDIN, DIMORVAN; DEL BEL CURY, ALTAIR ANTONINHA. The substitution of the implant and abutment for their analogs in mechanical studies: In vitro and in silico analysis. Materials Science & Engineering C-Materials for Biological Applications, v. 75, p. 50-54, JUN 1 2017. (14/23358-0)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

GOMES, Rafael Soares. Misfit and fracture load of implant-supported monolithic crowns in zirconia-reinforced lithium silicate. 2016. Master's Dissertation - Universidade Estadual de Campinas (UNICAMP). Faculdade de Odontologia de Piracicaba Campinas, SP.